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Questions and Answers
What does data security refer to?
Data integrity ensures that data is only accessible to authorized users.
False
What is the motive of data integrity?
The validity of data.
Data security is concerned with the ______ of data.
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Match the following concepts with their descriptions:
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What is a domain in the context of a database table?
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What is an example of a database constraint?
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Foreign keys establish dependencies between tables.
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What happens if you delete a primary key referenced in another table?
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Study Notes
Data Security vs Data Integrity
- Data security protects data from unauthorized access, allowing only approved users to view and manipulate information.
- Data integrity ensures data accuracy and consistency, upholding data quality through defined rules and procedures.
- Data security focuses on protecting data from corruption through controlled access, while data integrity focuses on the validity and wholeness of the data.
- Data security aims to ensure only authorized users can access data, while data integrity ensures data correctness and absence of corruption.
- Data security utilizes authentication and authorization, masking, and encryptions to protect data, while data integrity relies on backups, error detection, user interface design, and data correction.
- Data security focuses on the physical protection of data against accidental or intentional loss or misuse, while data integrity centers on logical protection, ensuring data accuracy, completeness, and consistency.
- Data security prevents unauthorized access, while data integrity prevents human errors during data entry.
- Data security can be implemented through user accounts with passwords, authentication schemes, while data integrity is enforced through rules such as primary keys, foreign keys, and relationship constraints.
Domain Constraints
- Domain constraints define allowable values for an attribute in a table.
- A domain constraint is a user-defined data type, combining data types with constraints like NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, and DEFAULT.
Referential Integrity
- Referential integrity ensures consistent relationships between tables within a database.
- Primary keys, uniquely identifying data in a table, can be referenced as foreign keys in other tables, creating dependencies between them.
- Foreign keys establish relationships between tables, allowing data changes or deletions in one table to affect data in related tables through a hierarchy of dependencies.
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Description
Explore the essential differences between data security and data integrity. This quiz covers key concepts such as unauthorized access, data accuracy, and methods used to ensure data quality. Understand how both aspects are crucial in maintaining the safety and reliability of information.
